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A pressure sensitive detection circuit, chip, system and pressure sensitive detection method

A detection circuit and detection method technology, applied in the direction of electrical components, electronic switches, pulse technology, etc., to avoid false triggering, improve interactive flexibility, and avoid repeated or missed reading.

Active Publication Date: 2021-11-05
SHANGHAI AWINIC MICROELECTRONIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a pressure-sensitive detection circuit, chip, system and pressure-sensitive detection method, which are used to solve many problems existing in the existing pressure-sensitive detection chip when interacting with an external host. question

Method used

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  • A pressure sensitive detection circuit, chip, system and pressure sensitive detection method
  • A pressure sensitive detection circuit, chip, system and pressure sensitive detection method
  • A pressure sensitive detection circuit, chip, system and pressure sensitive detection method

Examples

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Embodiment 1

[0046] like figure 1 As shown, this embodiment provides a pressure-sensitive detection circuit, and the pressure-sensitive detection circuit 100 includes:

[0047] N gain amplification modules 101, configured to receive an analog electrical signal output by a corresponding pressure sensor, and perform gain amplification on the analog electrical signal;

[0048] The N-channel analog-to-digital conversion module 102 is correspondingly connected to the output terminals of the N gain amplification modules 101, and is used to sequentially perform analog-to-digital conversion on the amplified signals output by the N gain amplification modules 101;

[0049] The interrupt generating module 103 is connected to the output end of the N-channel analog-to-digital conversion module 102, and is used to perform signal processing on the digital signals sequentially output by the N-channel analog-to-digital conversion module 102 and generate an interrupt signal, and the interrupt signal include...

Embodiment 2

[0067] like image 3 As shown (in the figure, N is equal to 1 as an example), compared with the pressure sensing circuit described in Embodiment 1, the interrupt generation module 103 described in this embodiment includes:

[0068] The filtering unit 1031 is connected to the output end of the N-channel analog-to-digital conversion module 102, and is used for filtering the digital signals sequentially output by the N-channel analog-to-digital conversion module 102 to generate N sets of pressure data;

[0069] The comparing unit 1032 is connected to the output end of the filtering unit 1031, and is used to compare N sets of pressure data with a comparison threshold in turn, and generate a comparison interrupt signal when the pressure data is greater than the comparison threshold.

[0070] Specifically, the comparison unit 1032 is realized by using a comparator; wherein, when N is greater than 1, the comparison unit 1032 can be realized by using only one comparator, or can be rea...

Embodiment 3

[0084] Such as Figure 4 As shown (in the figure, N is equal to 1 as an example), compared with the pressure sensing circuit described in Embodiment 1, the interrupt generation module 103 described in this embodiment includes:

[0085] The filtering unit 1031 is connected to the output end of the N-channel analog-to-digital conversion module 102, and is used for filtering the digital signals sequentially output by the N-channel analog-to-digital conversion module 102 to generate N sets of pressure data, and in the The N channel analog-to-digital conversion module 102 generates an ADC interrupt signal after completing N channel sampling;

[0086] The comparing unit 1032 is connected to the output end of the filtering unit 1031, and is used to compare N sets of pressure data with a comparison threshold in turn, and generate a comparison interrupt signal when the pressure data is greater than the comparison threshold.

[0087] Specifically, the comparison unit 1032 is realized b...

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Abstract

The present invention provides a pressure sensing circuit, a chip, a system and a pressure sensing method. The pressure sensing circuit includes: N gain amplification modules for receiving analog electrical signals output by corresponding pressure sensors and performing gain amplification; N The channel analog-to-digital conversion module is used to sequentially perform analog-to-digital conversion on the amplified signals output by the N gain amplification modules; the interrupt generation module is connected to the output end of the N-channel analog-to-digital conversion module, and is used to perform analog-to-digital conversion on the N-channel analog-to-digital conversion module. The digital signals sequentially output by the digital conversion module are processed for signal processing, and an interrupt signal is generated, and the interrupt signal includes at least one of an ADC interrupt signal, a comparison interrupt signal, and a press interrupt signal; wherein, N is a positive integer greater than or equal to 1. Through the pressure sensing circuit, chip, system and pressure sensing method provided by the present invention, the problems of high interactive power consumption, missing data reporting, large cost and large area existing in the existing pressure sensing chip when interacting with an external host are solved .

Description

technical field [0001] The technical field of pressure sensing of the present invention, in particular relates to a pressure sensing circuit, chip, system and pressure sensing method. Background technique [0002] The principle of pressure sensing is that when the pressure sensor feels the pressure, it will generate an analog electrical signal according to a certain rule. After the analog electrical signal is amplified and processed by analog-to-digital conversion, a digital signal proportional to the pressure is generated. The digital signal is then processed by an algorithm. It can then be used to recognize press actions or swipe gestures. [0003] At present, pressure-sensitive detection is widely used in mobile phones, TWS (True Wireless Stereo) earphones, home appliances and other devices that are particularly sensitive to power consumption and cost to detect buttons and gestures. At this time, the high power consumption brought by pressure-sensitive buttons is It is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K17/975
CPCH03K17/975
Inventor 秦涛张聪
Owner SHANGHAI AWINIC MICROELECTRONIC TECH CO LTD
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